PDF打印工牌DEMO

package com.pdf.util;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.File;
import java.io.FileOutputStream;

/**
 * 生成pdf公共类
 * @author ytj
 * @date 2021/11/21
 */
public class PdfUtil {

    // 定义全局的字体静态变量
    private static Font titlefont;
    private static Font headfont;
    private static Font keyfont;
    private static Font textfont;
    private static Font tablefont;
    // 最大宽度
    private static int maxWidth = 520;
    // 静态代码块
    static {
        try {
            // 不同字体（这里定义为同一种字体：包含不同字号、不同style）
            BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            titlefont = new Font(bfChinese, 16, Font.BOLD);
            headfont = new Font(bfChinese, 14, Font.BOLD);
            keyfont = new Font(bfChinese, 12, Font.NORMAL);
            tablefont=new Font(bfChinese,10,Font.BOLD);
            textfont = new Font(bfChinese, 10, Font.NORMAL);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 每英寸的像素
     */
    public static final float DPI = 72f;

    /**
     * 每毫米像素（1英寸=25.4毫米）
     */
    public static final float DPMM = DPI / 25.4f;

    /**
     * 打印名单
     * */
    public static void nameDoublePdf(Document document) throws Exception{
        // 段落
        Paragraph paragraph = new Paragraph("PDF工牌打印测试", headfont);
        paragraph.setAlignment(1); //设置文字居中 0靠左   1，居中     2，靠右
        paragraph.setIndentationLeft(12); //设置左缩进
        paragraph.setIndentationRight(12); //设置右缩进
        paragraph.setFirstLineIndent(24); //设置首行缩进
        paragraph.setLeading(20f); //行间距
        paragraph.setSpacingBefore(5f); //设置段落上空白
        paragraph.setSpacingAfter(10f); //设置段落下空白

        // 表格
        PdfPTable table = createTablesPaent(new float[] { 260,260 });
        //table.addCell(createCell("第 1 页，共 1 页", keyfont, Element.ALIGN_RIGHT, 4, false));
        //table.addCell(createCell("信息", keyfont, Element.ALIGN_LEFT, 2, false));
        PdfPTable table1=createTables(new float[]{50,50,80,90});
        PdfPTable table2=createTables(new float[]{50,50,80,90});

        Image image = Image.getInstance("E:/照片.jpg");
        image.setAlignment(Image.ALIGN_CENTER);
        image.scalePercent(7); //依照比例缩放、

        table1.addCell(createCell("施工人员通行证", headfont, Element.ALIGN_CENTER,4));
       // PdfPCell
        table1.addCell(createImageCell(image, 2,2,5));
        table1.addCell(createCell("姓名", textfont, Element.ALIGN_LEFT,1));
        table1.addCell(createCell("张仁", tablefont, Element.ALIGN_CENTER,1));
        table1.addCell(createCell("电话", textfont, Element.ALIGN_LEFT,1));
        table1.addCell(createCell("13679073", tablefont, Element.ALIGN_CENTER,1));
        table1.addCell(createCell("编号", textfont, Element.ALIGN_LEFT,1));
        table1.addCell(createCell("1889", tablefont, Element.ALIGN_CENTER,1));
        table1.addCell(createCell("施工项目", textfont, Element.ALIGN_LEFT,1));
        table1.addCell(createCell("秀（父子）", tablefont, Element.ALIGN_CENTER,1));
        table1.addCell(createCell("负责人电话", textfont, Element.ALIGN_LEFT,1));
        table1.addCell(createCell("153511", tablefont, Element.ALIGN_CENTER,1));
        table1.addCell(createCell("FOEN 奋安", headfont, Element.ALIGN_CENTER,4));

        table2.addCell(createCell("施工人员通行证", headfont, Element.ALIGN_CENTER,4));
        table2.addCell(createImageCell(image, 2,2,5));
        table2.addCell(createCell("姓名", textfont, Element.ALIGN_LEFT,1));
        table2.addCell(createCell("张继2", tablefont, Element.ALIGN_CENTER,1));
        table2.addCell(createCell("电话", textfont, Element.ALIGN_LEFT,1));
        table2.addCell(createCell("139016073", tablefont, Element.ALIGN_CENTER,1));
        table2.addCell(createCell("编号", textfont, Element.ALIGN_LEFT,1));
        table2.addCell(createCell("1831", tablefont, Element.ALIGN_CENTER,1));
        table2.addCell(createCell("施工项目", textfont, Element.ALIGN_LEFT,1));
        table2.addCell(createCell("李（父子）", tablefont, Element.ALIGN_CENTER,1));
        table2.addCell(createCell("负责人电话", textfont, Element.ALIGN_LEFT,1));
        table2.addCell(createCell("1519549", tablefont, Element.ALIGN_CENTER,1));
        table2.addCell(createCell("FOEN 奋安", headfont, Element.ALIGN_CENTER,4));

        // 添加图片//https://img-blog.net/20180801174617455?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zNzg0ODcxMA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
        Image image2 = Image.getInstance("E:/人资部章.gif");
        image2.setAlignment(Image.ALIGN_CENTER);
        //image.scalePercent(20); //依照比例缩放、
        image2.scaleAbsolute(20 * DPMM, 20 * DPMM); // 设置印章大小为 40mm × 40mm

       // table1.addCell(image2);

        PdfPCell cell = new PdfPCell(table1);
        cell.setVerticalAlignment(Element.ALIGN_LEFT);
        cell.setHorizontalAlignment(Element.ALIGN_LEFT);
        cell.setUseBorderPadding(true);
        cell.disableBorderSide(15);//去除全部线条
        table.addCell(cell);

        PdfPCell cell1 = new PdfPCell(table2);
        cell1.setVerticalAlignment(Element.ALIGN_RIGHT);
        cell1.setHorizontalAlignment(Element.ALIGN_RIGHT);
        cell1.setUseBorderPadding(true);
        cell1.disableBorderSide(15);
        table.addCell(cell1);




        document.add(paragraph);
        document.add(table);
        //document.add(image2);

    }


/**------------------------创建表格单元格的方法start----------------------------*/
    /**
     * 创建单元格(指定字体)
     * @param value
     * @param font
     * @return
     */
    public PdfPCell createCell(String value, Font font) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);//设置字体位置
        cell.setHorizontalAlignment(Element.ALIGN_CENTER);
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }
    /**
     * 创建单元格（指定字体、水平..）
     * @param value
     * @param font
     * @param align
     * @return
     */
    public PdfPCell createCell(String value, Font font, int align) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setMinimumHeight(20);
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }
    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @return
     */
    public static PdfPCell createCell(String value, Font font, int align, int colspan) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setMinimumHeight(20);
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @return
     */
    public PdfPCell createCell(String value,String nextValue, Font font,int align, int colspan) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setMinimumHeight(50);
        cell.setRight(10);
        Phrase phrase=new Phrase();
        phrase.add(new Chunk(value,font));
        phrase.add(Chunk.NEWLINE);
        phrase.add(Chunk.NEWLINE);
        phrase.add(new Chunk(nextValue,font));
        cell.setPhrase(phrase);
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、单元格跨x行合并）
     * @param align
     * @param colspan
     * @param rowSpan
     * @return
     */
    public static PdfPCell createImageCell(Image image, int align, int colspan, int rowSpan) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setRowspan(rowSpan);
        cell.setMinimumHeight(80);
        cell.addElement(image);
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、单元格跨x行合并）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @param rowSpan
     * @return
     */
    public PdfPCell createHeightCell(String value, Font font, int align, int colspan,int rowSpan) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setRowspan(rowSpan);
        cell.setMinimumHeight(80);//设置最小行高
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、单元格跨x行合并）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @param rowSpan
     * @return
     */
    public PdfPCell createCell(String value, Font font, int align, int colspan,int rowSpan) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setRowspan(rowSpan);
        cell.setMinimumHeight(20);
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }
    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @return
     */
    public PdfPCell createCell(String value, Font font, int align, int colspan,float height) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setMinimumHeight(height);
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }
    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、单元格跨x行合并）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @param rowSpan
     * @return
     */
    public PdfPCell createCell(String value, Font font, int align, int colspan,int rowSpan,float height) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setRowspan(rowSpan);
        cell.setMinimumHeight(height);
        cell.setPhrase(new Phrase(value, font));
        return cell;
    }

    public PdfPCell createCell(){
        PdfPCell cell = new PdfPCell();
        cell.setBorder(0);//设置表格线宽
        cell.setPaddingTop(15.0f);//上间距
        cell.setPaddingBottom(8.0f);//下间距
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、设置单元格内边距）
     * @param value
     * @return
     */
    public PdfPCell createCell(String value) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(Element.ALIGN_LEFT);
        cell.setColspan(7);
        cell.setPhrase(new Phrase(value,textfont ));
        cell.setBorder(0);
        cell.setPaddingTop(1);
        cell.setPaddingBottom(2.5F);
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、设置单元格内边距）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @return
     */
    public PdfPCell createTitleCell(String value, Font font, int align, int colspan) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(3.0f);
        cell.setBorder(0);
        cell.setPaddingTop(1.0f);
        cell.setPaddingBottom(3f);
        return cell;
    }

    /**
     * 创建单元格（指定字体、水平居..、单元格跨x列合并、设置单元格内边距）
     * @param value
     * @param font
     * @param align
     * @param colspan
     * @param boderFlag
     * @return
     */
    public static PdfPCell createCell(String value, Font font, int align, int colspan, boolean boderFlag) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setColspan(colspan);
        cell.setPhrase(new Phrase(value, font));
        cell.setPadding(3.0f);
        if (!boderFlag) {
            cell.setBorder(0);
            cell.setPaddingTop(15.0f);
            cell.setPaddingBottom(8.0f);
        } else if (boderFlag) {
            cell.setBorder(0);
            cell.setPaddingTop(0.0f);
            cell.setPaddingBottom(15.0f);
        }
        return cell;
    }
    /**
     * 创建单元格（指定字体、水平..、边框宽度：0表示无边框、内边距）
     * @param value
     * @param font
     * @param align
     * @param borderWidth
     * @param paddingSize
     * @param flag
     * @return
     */
    public PdfPCell createCell(String value, Font font, int align, float[] borderWidth, float[] paddingSize, boolean flag) {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(align);
        cell.setPhrase(new Phrase(value, font));
        cell.setBorderWidthLeft(borderWidth[0]);
        cell.setBorderWidthRight(borderWidth[1]);
        cell.setBorderWidthTop(borderWidth[2]);
        cell.setBorderWidthBottom(borderWidth[3]);
        cell.setPaddingTop(paddingSize[0]);
        cell.setPaddingBottom(paddingSize[1]);
        if (flag) {
            cell.setColspan(2);
        }
        return cell;
    }
/**------------------------创建表格单元格的方法end----------------------------*/


/**--------------------------创建表格的方法start------------------- ---------*/
    /**
     * 创建默认列宽，指定列数、水平(居中、右、左)的表格
     * @param colNumber
     * @param align
     * @return
     */
    public PdfPTable createTable(int colNumber, int align) {
        PdfPTable table = new PdfPTable(colNumber);
        try {
            table.setTotalWidth(maxWidth);
            table.setLockedWidth(true);
            table.setHorizontalAlignment(align);
            table.getDefaultCell().setBorder(1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return table;
    }
    /**
     * 创建指定列宽、列数的表格
     * @param widths
     * @return
     */
    public PdfPTable createTable(float[] widths) {
        PdfPTable table = new PdfPTable(widths);
        try {
            table.setTotalWidth(maxWidth);
            table.setLockedWidth(true);
            table.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.getDefaultCell().setBorder(1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return table;
    }

    /**
     * 创建指定列宽、列数的表格
     * @param widths
     * @return
     */
    public static PdfPTable createTablesPaent(float[] widths) {
        PdfPTable table = new PdfPTable(widths);
        try {
            table.setTotalWidth(maxWidth);
            table.setLockedWidth(true);
            table.setHorizontalAlignment(Element.ALIGN_CENTER);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return table;
    }

    /**
     * 创建指定列宽、列数的表格
     * @param widths
     * @return PdfPTable
     */
    public static PdfPTable createTables(float[] widths) {
        PdfPTable table = new PdfPTable(widths);
        try {
            table.setTotalWidth(230);
            table.setLockedWidth(true);
            table.setHorizontalAlignment(Element.ALIGN_CENTER);
            table.getDefaultCell().setBorder(1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return table;
    }
    /**
     * 创建空白的表格
     * @return
     */
    public PdfPTable createBlankTable() {
        PdfPTable table = new PdfPTable(1);
        table.getDefaultCell().setBorder(0);
        table.addCell(createCell("", keyfont));
        table.setSpacingAfter(20.0f);
        table.setSpacingBefore(20.0f);
        return table;
    }
/**--------------------------创建表格的方法end------------------- ---------*/
}

<dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.13</version>
        </dependency>

        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-asian</artifactId>
            <version>5.2.0</version>
        </dependency>

package com.pdf.service;

import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfGState;
import com.itextpdf.text.pdf.PdfWriter;
import com.pdf.util.MyHeaderFooter;
import com.pdf.util.PdfUtil;
import com.pdf.util.Watermark;
import com.pdf.util.WatermarkImage;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author ytj
 * @date 2021/12/2
 */
@Service
public class PrintService {

    public void print(HttpServletResponse response) {
        try {
            Document document = new Document(PageSize.A4);// 建立一个Document对象
            PdfWriter writer = PdfWriter.getInstance(document,response.getOutputStream());
            writer.setPageEvent(new Watermark("FOEN,FOEN,FOEN,FOEN"));// 水印
            writer.setPageEvent(new MyHeaderFooter());// 页眉/页脚
            document.open();//打开
            document.addTitle("F工牌打印");// 标题
            document.addAuthor("GZH");// 作者
            document.addSubject("主题");// 主题
            document.addKeywords("Keywords@iTextpdf");// 关键字
            document.addCreator("GZH");// 创建者

            writer.setPageEvent(new WatermarkImage(Image.getInstance("E:/人资部章.gif"),writer));// 水印来解决公章问题
            /**
            // 加入水印
            PdfContentByte waterMar = writer.getDirectContentUnder();
            // 开始设置水印
            waterMar.beginText();
            // 设置水印透明度
            PdfGState gs = new PdfGState();
            // 设置笔触字体不透明度为0.4f
            gs.setStrokeOpacity(0.95f);
            try {
                Image image = Image.getInstance("E:/人资部章.gif");
                // 设置坐标 绝对位置 X Y
                image.setAbsolutePosition(100, 100);
                // 设置旋转弧度
                image.setRotation(0);// 旋转 弧度
                // 设置旋转角度
                image.setRotationDegrees(0);// 旋转 角度
                // 设置等比缩放
                //image.scalePercent(90);// 依照比例缩放
                 image.scaleAbsolute(100,100);//自定义大小
                // 设置透明度
                waterMar.setGState(gs);
                // 添加水印图片
                waterMar.addImage(image);
                // 设置透明度
                waterMar.setGState(gs);
                //结束设置
                waterMar.endText();
                waterMar.stroke();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                waterMar = null;
                gs = null;
            }

             **/



            new PdfUtil().nameDoublePdf(document);//生成PDF内容
            document.close();//必须要关闭，否则生成的文件打不开
        } catch (Exception e) {
            System.out.println("创建pdf文件出错:"+e.getMessage());
        }
    }
}

package com.pdf.util;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;


import java.io.IOException;

/**
 * 水印内容(图片或公章)
 */
public class WatermarkImage extends PdfPageEventHelper {

    //private static final Log logger = Log.get();

    private Image image;//水印内容图片

    private PdfWriter writer;

    @Override
    public void onEndPage(PdfWriter writer, Document document) {
        for(int i=0 ; i<1; i++) {
            for(int j=0; j<2; j++) {
                // 加入水印
                PdfContentByte waterMar = writer.getDirectContentUnder();
                // 开始设置水印
                waterMar.beginText();
                // 设置水印透明度
                PdfGState gs = new PdfGState();
                // 设置笔触字体不透明度为0.4f
                gs.setStrokeOpacity(0.25f);
                try {

                    // 设置透明度
                    waterMar.setGState(gs);
                    // 设置坐标 绝对位置 X Y
                    System.out.println("writer.getPageNumber():"+writer.getPageNumber());
                    if( j % 2 == 1){
                        this.image.setAbsolutePosition(150, 650);
                    }else{
                        this.image.setAbsolutePosition(420, 650);
                    }

                    // 设置旋转弧度
                    this.image.setRotation(0);// 旋转 弧度
                    // 设置旋转角度
                    this.image.setRotationDegrees(0);// 旋转 角度
                    // 设置等比缩放
                    //image.scalePercent(90);// 依照比例缩放
                    this.image.scaleAbsolute(100,100);//自定义大小
                    // 添加水印图片
                    waterMar.addImage(this.image);
                    // 设置透明度
                    waterMar.setGState(gs);
                    //结束设置
                    waterMar.endText();
                    waterMar.stroke();
                } catch (DocumentException e) {
                    e.printStackTrace();
                }finally {
                    waterMar = null;
                    gs = null;
                }
            }
        }
    }

    public WatermarkImage(Image image,PdfWriter writer) {
        this.writer = writer;
        this.image = image;
    }
}

package com.pdf.util;

import com.itextpdf.text.Document;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.GrayColor;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfWriter;

/**
 * 水印内容(文本)
 */
public class Watermark extends PdfPageEventHelper {
    Font FONT = new Font(Font.FontFamily.HELVETICA, 30, Font.BOLD, new GrayColor(0.95f));
    private String waterCont;//水印内容

    public Watermark(String waterCont) {
        this.waterCont = waterCont;
    }

    @Override
    public void onEndPage(PdfWriter writer, Document document) {
        for(int i=0 ; i<5; i++) {
            for(int j=0; j<5; j++) {
                ColumnText.showTextAligned(writer.getDirectContentUnder(),
                        Element.ALIGN_CENTER,
                        new Phrase(this.waterCont == null ? "HELLO WORLD" : this.waterCont, FONT),
                        (50.5f+i*350),
                        (40.0f+j*150),
                        writer.getPageNumber() % 2 == 1 ? 45 : -45);
            }
        }
    }
}

package com.pdf.util;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;

import java.io.IOException;

/**
 * PDF页头页码
 */
public class MyHeaderFooter extends PdfPageEventHelper {
    // 总页数
    PdfTemplate totalPage;
    Font hfFont;
    {
        try {
            hfFont = new Font(BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED), 8, Font.NORMAL);
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    // 打开文档时，创建一个总页数的模版
    public void onOpenDocument(PdfWriter writer, Document document) {
        PdfContentByte cb =writer.getDirectContent();
        totalPage = cb.createTemplate(30, 16);
    }
    // 一页加载完成触发，写入页眉和页脚
    public void onEndPage(PdfWriter writer, Document document) {
        PdfPTable table = new PdfPTable(3);
        try {
            table.setTotalWidth(PageSize.A4.getWidth() - 100);
            table.setWidths(new int[] { 24, 24, 3});
            table.setLockedWidth(true);
            table.getDefaultCell().setFixedHeight(-10);
            table.getDefaultCell().setBorder(Rectangle.BOTTOM);

            table.addCell(new Paragraph("FOEN工牌打印/", hfFont));// 可以直接使用addCell(str)，不过不能指定字体，中文无法显示
            table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
            table.addCell(new Paragraph("第" + writer.getPageNumber() + "页/", hfFont));
            // 总页数
            PdfPCell cell = new PdfPCell(Image.getInstance(totalPage));
            cell.setBorder(Rectangle.BOTTOM);
            table.addCell(cell);
            // 将页眉写到document中，位置可以指定，指定到下面就是页脚
            table.writeSelectedRows(0, -1, 50,PageSize.A4.getHeight() - 20, writer.getDirectContent());
        } catch (Exception de) {
            throw new ExceptionConverter(de);
        }
    }

    // 全部完成后，将总页数的pdf模版写到指定位置
    public void onCloseDocument(PdfWriter writer,Document document) {
        String text = "总" + (writer.getPageNumber()) + "页";
        ColumnText.showTextAligned(totalPage, Element.ALIGN_LEFT, new Paragraph(text,hfFont), 2, 2, 0);
    }

}